Method and apparatus for adjusting the operating force applied to gears during gear shifts

US4267750A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Helmut Espenschied · Ludwigsburg, DE
• Uwe Kiencke · Ludwigsburg, DE
• Alfred Schulz · Oberriexingen, DE

Key dates

• Filing date: Aug 9, 1978
• Grant date: May 19, 1981
• Expiry date: Aug 9, 1998

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H61/0021
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The main pressure in the gearing which under normal operating conditions is 150% of the amount required to transmit the then-present torque is reduced to 100% when an upshift takes place under load or a downshift takes place under no load. For a downshift under load and an upshift under no load the pressure is reduced to about 30%. The position of the control rod of an injection pump at the beginning of a shift operation is stored until the shift is completed. This allows the present system to cooperate with a system wherein the control of the injection pump is shifted from the gas pedal to a regulator during gear shifts.